I used to believe Rosario's power + Mancini's porous defense = Automatic KO for Rosario. I no longer think it's that clear cut either. The way to beat Rosario, as we've seen, it to crowd him, which Mancini could do with the best of them. He was also a much faster starter than Ramirez, which could have been part of the reason Ramirez got dumped on his ass twice in the rematch.

Just because Chavez crowded Rosario, doesn't mean Boom Boom could.

It goes without saying but, Chavez was a light year above Mancini.

Rosario had enough power to starch Mancini early. Bramble was thought to have the best chin in boxing when he fought Chapo, and got starched in 2. And Rosario hurt Camacho worse than ANYBODY did with one left hook.

Boom Boom would only walk into but so many Chapo counters before ending up on his back.